19. 基础IO(3)——序列化与反序列化

痛定思痛。 2022-11-06 05:48 131阅读 0赞

序列化：把一个结构化数据（对象）编程一个二进制的bit流（就比如游戏中的存档，保存游戏场景）  
反序列化：把二进制的bit流还原回原来的对象（就比如游戏中的读档）

## 序列化 ##

import java.io.*;
    
    class Student implements Serializable {
        
        public String name;
        public int age;
        public int score;
    }
    public class IODemo6 {
        
        public static void main(String[] args) throws IOException {
        
            Student student = new Student();
            student.name = "ss";
            student.age = 12;
            student.score = 34;
            serialzeStudent(student);
        }
    
        private static void serialzeStudent(Student student) throws IOException {
        
            ObjectOutputStream objectOutputStream = new ObjectOutputStream(new FileOutputStream("d:/student.txt"));
            objectOutputStream.writeObject(student);//序列化和写文件同时搞定
            objectOutputStream.close();
        }

执行后会在指定位置生成一个student文件

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ1MTM2MTg5_size_16_color_FFFFFF_t_70]

## 反序列化 ##

import java.io.FileInputStream;
    import java.io.IOException;
    import java.io.ObjectInputStream;
    
    public class IODemo7 {
        
        public static void main(String[] args) throws IOException, ClassNotFoundException {
        
            Student ret = deserializeStudent();
            System.out.println(ret.name);
            System.out.println(ret.age);
            System.out.println(ret.score);
        }
    
        public static Student deserializeStudent() throws IOException, ClassNotFoundException {
        
            ObjectInputStream objectInputStream = new ObjectInputStream(new FileInputStream("d:/student.txt"));
            Student s = (Student) objectInputStream.readObject();
            return s;
        }
    }

就读取出了当前文件中的内容

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ1MTM2MTg5_size_16_color_FFFFFF_t_70 1]

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